Lighting fixture



June 16, 1925. 1,542,594

J. A. AMOS LIGHTING FIXTURE Filed June 9, 1924 A ORNEY Patented June 16, 1925.

UNITED STATES PATENT OFFICE.

JOHN A. AMOS, OF ST. LOUIS, MISSOURI, ASSIGNOR T OLIVER ELECTRIC AND MANU- FACTURING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

LIGHTING FIXTURE.

Application filed June 9,

To all whom it may concern:

Be it known that I, JOHN A. AMos, a citizen of the United States of America, residing at the city of St. Louis, State of Missouri, United States of America, have invented a certain new and useful Lighting Fixture, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming partof this specification.

My invention relates to a lighting fixture particularly adapted for use in locomotive cabs, and its object is to provide a rigid, simple structure for this purpose which will have the desirable characteristics hereinafter pointed out.

In the accompanying drawings which illustrate a fixture embodying my invention, Figure 1 is a sectional View; Figure 2 is a plan view with lamp and cover-shield removed; Figure 3 is a bottom plan view of the cover-shield; and Figure 4 is a bottom a plan view of the fixture shown in Figure 1.

My improved fixture embodies a housing 1 which may be provided with a threaded hub or hubs 2 for connection with the wiring conduit. A lamp socket 3 is secured in the bottom of this housing and is provided with the usual switch operating. key member 4 the stem of which extends through a slot in the housing. One end of this slot opens at the ed of the housing whereby the assemble socket and switch may be introduced together into the housing when the cover thereof is removed.

The lamp shield 5 is of rigid material and is provided with an integral laterally extending base portion 6 which is dimensioned to form a cover for the housing, being secured thereto by screws 7 engaging with threaded lugs 8 on the interior of the housing. As shown this cover-shield is provided with a central opening into which the lamp receiving portion of the socket extends, being insulated from the shield by a tubular insulating sleeve 9.

In order to limit the lateral motion of the switch stem in its slot and prevent loosen- 1924. Serial No. 718,765.

ing or distorting the switch parts operated by the stem, which frequently occurs in connection with sockets of this type in which lateral strains on the switch stem are not prevented, the cover 6 is provided with an integral lug 10 designed to lie over the outer end of the slot in the housing for the reception of the switch stem and thus form an abutment limiting lateral motion of the stem. In order that the cover may be so mounted on the housing that the shield may be positioned to permit the emission of light laterally instead of downwardly, I provide the'cover with a second lug 1O ninety degrees displaced from the lug 10, and which has the same purpose. The cover being provided with openings for the securing screws 7 which are ninety degrees apart, the covershield may either be placed in the position shown in the drawings or in a position rotatively displaced ninety degrees therefrom. In either position the lateral strain on the key stem referred to will be prevented by lug 10 or luglO.

In addition to the manifest advantages of rigidity and simplicity the making of the shield and housing cover in one piece makes it possible to design the shield not to receive a lamp larger than the desired standard and therefore prevents revision of the lighting of the cab by an engineer to suit his particular desires in that respect.

Having fully described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a lighting fixture, the combination of a housing, a lamp socket therein, a switch in the housing having an operating stem extending to the exterior of the housing through an open ended slot in said housing, and a lamp shield having an integral base portion forming a cover for the housing, said cover portion being provided with a lug forming a stop limiting movement of the switch stem in the housing slot.

2. In a lighting fixture, the combination of a housing, a lamp socket and switch therein, said switch having an operating stem extending through the housing wall, a cover for the housing having two spaced lugs, and

cover securing means so located with respect to said lugs that in either of two operative positions of the cover one of said lugs will "form an abutment limiting lateral motion of the switch stein in one direction.

In a lighting fixture, the combination of a housing, a lamp socket therein, a switch in the housing having an operating stein extending to the exterior of the housing through an open ended slot in said housing, and a lamp shield having an integral base portion forming a cover for the housing.

In testimon whereof, I have hereunto set my hand, this the 6th day of June, 1024.

JOHN A. AMos. 11. 5 

